Blasting through the Sand

Sunbaked Sand Castle

Sandblast Speed Run (Speedy Comet in Orbit)

This mission is only accessible, unless already completed, if a Speedy Comet is in orbit. 4 minutes and a half are available to complete the level, while rocks-carrying whirlwinds leading to the star aren't available.

Purple Coins in the Desert (Purple Comet in Orbit)

Bullet Bill on Your Back

It's a hidden star, in the Sunbaked Sand Castle level. While in the planet with a spiky plant in the middle, the player should Ground Pound on a log which will appear when the planet is shrinking. Then notes appear, and they have to be collected, and a Launch Star will lead the player to the Star area. While there, the player should Ground Pound on an interrupter which will level the Bullet Bill Launcher while the Star, a Rainbow Star and some Star Bits are separately stored in cages. The player has to make a high jump (while holding the Z button, jump) to attract the Bullet Bill's attention. Then he has to run away to the Rainbow Star, then kill all the Dry Bones bothering the player. Repeating this action and going behind the Power Star will be enough to complete the level.

Treasure of the Pyramid (Green Power Star)

In the Blasting through the Sand level, instead of continuing in the Launch Star upper available, the player has to move down of the planet ahead of the three rolling rocks. A Hungry Luma will want to eat 30 Star Bits, and a planet appears. The player will take the Launch Star and automatically enter to a Warp Pipe. Staying in the green lights will let the sand move, discovering breakable things containing Silver Stars. Exploring all the parts of the lights will let the 5 Stars being liberated, making the Green Star appear.

Trivia

This galaxy has 7 stars, which makes the galaxy the most missions in the game.